HELP - F4i motor knocking video.

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Old 05-02-2009, 08:16 PM
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Unhappy HELP - F4i motor knocking video.

I just stuck this motor in and it's knocking. Any ideas? The sound quality is pretty bad, but you get the picture. It has a cam chain tensioner adjustment on it, but I don't know if that's what the problem is.

[youtube]http://www.youtube.com/watch?v=JhRLCDKoTVs[/youtube]
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Old 05-02-2009, 08:38 PM
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Re: HELP - F4i motor knocking video.

sounds pretty grumpy to me, thats not the cam chain
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Old 05-02-2009, 08:43 PM
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Re: HELP - F4i motor knocking video.

ya that doesnt sound like a cam chain. i wouldnt start the bike anymore just going to cause more damage
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Old 05-02-2009, 08:46 PM
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Re: HELP - F4i motor knocking video.

Yeah, I'm pissed...I put a bunch of lucas in it, too. It must be bad. It would figure that I would find a blown motor.

Last edited by Huge Matt; 05-02-2009 at 08:48 PM.
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Old 05-02-2009, 10:07 PM
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Re: HELP - F4i motor knocking video.

rod knock or exploded clutch basket. pull the clutch cover.
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Old 05-02-2009, 10:52 PM
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Re: HELP - F4i motor knocking video.

Originally Posted by YSRRider
rod knock or exploded clutch basket. pull the clutch cover.
+1, if thats not it... well... I dont wanna be the one to say it.
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Old 05-02-2009, 11:43 PM
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Re: HELP - F4i motor knocking video.

rod knock 100%
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Old 05-03-2009, 12:04 AM
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Re: HELP - F4i motor knocking video.

get one of those mechanic stethescopes to find out where its coming from
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Old 05-03-2009, 12:14 AM
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Re: HELP - F4i motor knocking video.

Originally Posted by Danger_Dave
get one of those mechanic stethescopes to find out where its coming from
i'd pull the clutch cover off first.... if thats the problem... easy fix, if you run it out of balance you will do more damage. The mag could be damaged as well but I'd put money on the clutch first. If thats not it, its definitely something in the bottom end.


I saw a motor on craiglist in the chicago area for like 175, it was missing the cams/valve cover. that would be an easy transplant.

Last edited by YSRRider; 05-03-2009 at 12:16 AM.
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Old 05-03-2009, 12:46 AM
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Re: HELP - F4i motor knocking video.

Well, **** cakes and doo-doo puffs...I really wanted to get to king of the south, but I guess that's not happening.
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Old 05-03-2009, 01:58 AM
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Re: HELP - F4i motor knocking video.

sucks man. get that **** running as soon as possible so u can get out riding again
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Old 05-05-2009, 11:26 AM
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Re: HELP - F4i motor knocking video.

It ended up being a combination of the cam chain and an exhaust leak. It's smooth as butter now, which I can't believe. It sounded really bad.
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Old 05-05-2009, 12:08 PM
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Re: HELP - F4i motor knocking video.

sounds like its a rev away from throwing a rod!
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Old 05-05-2009, 12:09 PM
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Re: HELP - F4i motor knocking video.

Originally Posted by Huge Matt
It ended up being a combination of the cam chain and an exhaust leak. It's smooth as butter now, which I can't believe. It sounded really bad.

wow read this after i posted you got lucky fo sho!
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